Pull chain pen



July 19, 1949. J. A. VIERLING 2,476,571

PULL CHAIN PEN Filed Oct. 3, 1947 Zinnentor JOHN A. VIERLING Gttotneg Patented July 19,1949

1 7 outrun PATENT John A. 'fierling; St. Paul, Minn, 1m nBiselow-cst Ba i, W 3 i 1 Hr n e i nrel t w ite in um nt in *M are? w th a a .n nt writing end and "a retractable inig resepvoir to which a writing point is attached. A feature resides in providing a ball point pen with an ink reservoir in ii wi h achaiaattached to the r r end of the reservoir which is adapted to draw the mam-mm an eutemcasingwhieh conceals the ball writing point when it is nat desired far use. It is e a iurther ieature at invention to provide a" writing instrument where the ink resemoir frictionally is held-within a casing-slideablg and longitudinally toeonoeal the writing instmxnentrw-Hen not in use and-wherein "the rear and ottlae ink reservoir is formed with a head having a transverse hole'extendin throughthe same whiehconnects with a longitudinal; hole attending into the ink reservoir to provide an air passageway mm the ink memoir, In this type of writing instrument, the ink is of a paste-like nature and does not flow like liquid. gowever, the ink is attracted tothe writing ball, to balance the airpressure in the reservoir, an opening must be provided to the outer atmosphere.

It is a feature to provide a pull chain which may be of a beaded chain type and which acts to form a loop which is slideably secured through the transverse opening formed in the head of the reservoir. This chain permits the user of the pen to pull the reservoir into position in the casing to conceal the writing tip. Further, the rear end of the ink reservoir is provided with a reduced shank portion and a shoulder so that when the pen is assembled, the rear end of the casing is rolled in annularly to form a stop to limit the backward movement within the casing. The head of the reservoir is pushed inwardly toward the casing to force the writing point out of the casing, and the same is maintained in writing position by the tight frictional fit of the "l'ig ure 31s an enlarged" section on; the line 3-,4

Figure 4 is an enlarged section on the line 4--4 of" Figure 2.

'My writ-ing instrument A is made up of a Small number of parts which include the outer casing lq "farmed with an elongated, cylindrical body andnaving'aforward conioailendl-l.

The inkreser-voir-B otmy-writing instrument A is formed with a writing tip I3 having a steel writing ball 41 mounted in the end thereof, so that the ball will rotate freely. The cylindrical base of the writing tipk3 is intight frictional contact with the forward inner edge ofthe conical end it, which construction aids in maintaining the tip it in a for-wand position for writing.

The inner cjhaniber H of; the reservoir B is adapted to support a supply or paste-like writing ink which feeds through the tip is to the ball i=4 ingthe ordinary-well-known manner.

The rear end of the inner chamber l-2- is formed with a head portion E5. n transverse air hole it is ,formedtljir-Qughfthe head portion 1-5, Extending from the head portion H5 is a reduced shank portion l1 and on the inner end thereof, I provide a socket 3 which is adapted to receive the rear end l9 of the tubular, hollow reservoir chamber l2. The rear end of the ink chamber I2 is rigidly secured in the socket l8 so that the socket ill, the shank I1 and the head I5 are virtually integrally connected to the rear end of the reservoir B. The shank portion I1 is constructed so that the large forward portion, thereof, which receives the rear end I!) of the chamber I2, maintains tight frictional contact with the inner surface of the outer casing Hi. This tight frictional contact maintains the writing tip l3 in an exposed forward position for writing, as illustrated in Fig. 3, when the chamber I2 is moved forwardly in the casing in by applying pressure on the head [5.

A longitudinal air passageway 20 is formed through the shank I! to provide an air passageway which is connected with the transverse passageway It to connect the inner chamber I2 of the reservoir B with the outer atmosphere. This permits the air to enter the reservoir chamber I2 as the ink therein is used up in writing.

In assembling my writing instrument A, the casing I0 is secured to the shank l1 against disengagement therefrom by forming an annular inturned shoulder 2| on the inner end of the casing In. This shoulder 2| engages the head l5 when the ink reservoir B is in the position' chain 22 threaded through the opening 16 which forms a convenient means of pulling the ink reservoir B into the casing H1, in which position the inner shoulder 21 engages the annular inner shoulder 23 to limit the telescopic movement of the casing l0 and the reservoirB. 'When the chain 22 is engaged, the reservoir B may easily be pulled back into the casing m which act conceals the writing ball M within the casing I0. This operation is made easier by the flexible chain 22 and takes place when the writing in-, strument A is not being used for writing, The casing Ill forms a convenient means of identification around the outer surface thereof or may bear any indicia for advertising purposes, but which is not illustrated in the drawings.

The section 3 illustrates the annular hole 24 which leads to the writing ball 14 from the inner ink chamber 12.

The section 4 illustrates the hole 20 formed through the shank [1, which permits air to pass into the ink chamber at any time.

I claim: I

l; A writing instrument including a casing, an ink reservoir slideably positioned within said casing, a writing ball tip formed on said reservoir, a rear 'end formed on said-reservoir tightly engageable within said casing including an enlarged head, a longitudinal air passageway through said end, a reduced shank portion, a transverse air passageway connecting, said longitudinal air passageway in said rear end of said reservoir, and a shoulder formed on the rear end of said casing adapted to tightly engage said reduced shank portion on said rear end of said reservoir.

2. A writing instrument including an ink reservoir, a casing, a writing end formed on said reservoir, a writing ball mounted freely rotatable in said writing end, a longitudinal ink passageway extending through said writing end to feed ink from said reservoirtoth'e writing'gball' on said writing tip, an operating'rod-=connected to the rear end of said reservoir, the body of said reservoir being formed of a tubular nature, an enlarged end formed on said rod adapted to tightly engage the inner surface of said casing; a socket in the inner end of said enlarged rod end for receiving the rear end of said reservoir, an enlarged head formed on the outer end of said rod, a reduced cylindrical shank between said 'socket and said head formed in said rod and longitudinal and transverse air passageways extending and connecting'in said rod to admit the outer air pressure to said ink reservoir, and a shoulder formed on said casing adapted to one gage said shank to limit the telescopic movement of said casing in said ink reservoir;

JOHN A. VIERLING.

REFERENCES CITED,

The following references are of record in the file of this patent: i r Y UNITED STATES PA'IENTS France 1910 

